Compostable bags

Posted: 14.04.09  |  Created by:

Single use compostable bags are also known as 'biodegradable' bags. However, not all bags labelled 'degradable' are actually 'biodegradable'. Only bags which meet the Australian standard of biodegradability are fully compostable.

In order to comply with the AS 4736-2006 Australian biodegradability standard - and thereby be considered compostable - plastic bags need to achieve or meet the following requirements:

• minimum of 90% biodegradation of plastic bags within 180 days in compost
• minimum of 90% of plastic bags should disintegrate into less than 2 mm pieces in compost within 12 weeks  
• no toxic substances should be formed during the composting of plastic bags
• hazardous substances such as heavy metals should not be present in plastic bags above the accepted levels
• bag should contain more than 50% organic materials.
  

Further information about the standard can be obtained from Standards Australia. Also see our detailed explanation of the Australian standard here.

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